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How does GPS work?

Did you know… GPS receivers are used by biologists to study animal behaviour?

Across the world, scientists researching animal behaviour are discovering the value of GPS to their work. One typical example gives an idea of the enormous potential of GPS in this and countless other areas of research.

In Kluane National Park in Alaska biologists are using GPS collars to track grizzlies as part of a major seven year study. They have been using conventional radio telemetry collars, but this only gives them the bear’s location when they fly over it, on average about once a week. So they decided to experiment with GPS collars programmed to record the animal's location several times a day. Some models store the information on the collar. Others use a satellite uplink so data can be retrieved on a computer back at base. It has transformed the research. Giving a much fuller picture of the bear's movements, feeding habits, etc. Information that will help protect individual bears and, in the long run, the species as a whole. It’s also saving the Park authorities money, as expensive flights over the park are no longer necessary.